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Course Queries Syllabus Queries 2 years ago
Posted on 16 Aug 2022, this text provides information on Syllabus Queries related to Course Queries. Please note that while accuracy is prioritized, the data presented might not be entirely correct or up-to-date. This information is offered for general knowledge and informational purposes only, and should not be considered as a substitute for professional advice.
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The coefficient of xkxkin the expansion of 1−2x−x2ex1−2x−x2ex is
This a question of university entrance examination, which my teachers didn't taught me and not in my syllabus.
I referred got this equation from Hall and Knight Algebra :
Coefficient of xrxr in the expansion of 1−ax−x2ex1−ax−x2ex is given by −1rr!{1+ar−r(r−1)}−1rr!{1+ar−r(r−1)}
Coefficient of xrxr in the expansion of 1−ax−x2ex1−ax−x2ex is given by
However applying this answer gives me :
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